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https://www.readbyqxmd.com/read/29623437/molecular-characterization-of-cosmopolitan-and-potentially-co-invasive-helminths-of-commensal-murid-rodents-in-gauteng-province-south-africa
#1
R S Julius, E V Schwan, C T Chimimba
Concurrent studies of helminth parasites of introduced and native rodent species are few and miss the opportunity to identify potential co-invasive parasite species. This study employed molecular tools to infer the phylogeny and elucidate the origin of potentially co-invasive parasites of commensal, murid rodents by assessing introduced Rattus norvegicus, Rattus rattus, Rattus tanezumi, and native Mastomys coucha in Gauteng Province, South Africa. Genotypes of Nippostrongylus brasiliensis recovered from R. norvegicus are nearly identical to those recovered from elsewhere in the world...
April 6, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29572697/movement-patterns-of-small-rodents-in-lassa-fever-endemic-villages-in-guinea
#2
Joachim Mariën, Fodé Kourouma, N'Faly Magassouba, Herwig Leirs, Elisabeth Fichet-Calvet
The Natal multimammate mouse (Mastomys natalensis) is the reservoir host of Lassa arenavirus, the etiological agent of Lassa fever in humans. Because there exists no vaccine for human use, rodent control and adjusting human behavior are currently considered to be the only options for Lassa fever control. In order to develop efficient rodent control programs, more information about the host's ecology is needed. In this study, we investigated the spatial behavior of M. natalensis and other small rodents in two capture-mark-recapture and four dyed bait (Rhodamine B) experiments in Lassa fever-endemic villages in Upper Guinea...
March 23, 2018: EcoHealth
https://www.readbyqxmd.com/read/29535612/neural-damage-in-experimental-trypanosoma-brucei-gambiense-infection-hypothalamic-peptidergic-sleep-and-wake-regulatory-neurons
#3
Claudia Laperchia, Yuan-Zhong Xu, Dieudonné Mumba Ngoyi, Tiziana Cotrufo, Marina Bentivoglio
Neuron populations of the lateral hypothalamus which synthesize the orexin (OX)/hypocretin or melanin-concentrating hormone (MCH) peptides play crucial, reciprocal roles in regulating wake stability and sleep. The disease human African trypanosomiasis (HAT), also called sleeping sickness, caused by extracellular Trypanosoma brucei ( T. b .) parasites, leads to characteristic sleep-wake cycle disruption and narcoleptic-like alterations of the sleep structure. Previous studies have revealed damage of OX and MCH neurons during systemic infection of laboratory rodents with the non-human pathogenic T...
2018: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/29529857/endoparasites-of-small-mammals-in-edo-state-nigeria-public-health-implications
#4
Clement Isaac, Benjamin Igho Igbinosa, John Asekhaen Ohiolei, Catherine Eki Osimen
Some small mammals occur as household pests and harbour a number of parasites that could be of public health importance. This study profiled the helminth and protozoan parasites in trapped small mammals within and around human dwelling places (houses) located across 4 major towns (Auchi, Benin, Ekpoma, and Uromi) and environs in Edo state, Nigeria. Six genera ( Apodemus sp., Crocidura sp., Mastomys natalensis , Mus musculus , Rattus sp., and Sorex sp.) were identified from 502 trapped small mammals. Overall, M...
February 2018: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/29491832/neural-damage-in-experimental-trypanosoma-brucei-gambiense-infection-the-suprachiasmatic-nucleus
#5
Chiara Tesoriero, Yuan-Zhong Xu, Dieudonné Mumba Ngoyi, Marina Bentivoglio
Trypanosoma brucei ( T. b. ) gambiense is the parasite subspecies responsible for most reported cases of human African trypanosomiasis (HAT) or sleeping sickness. This severe infection leads to characteristic disruption of the sleep-wake cycle, recalling attention on the circadian timing system. Most animal models of the disease have been hitherto based on infection of laboratory rodents with the T. b. brucei subspecies, which is not infectious to humans. In these animal models, functional, rather than structural, alterations of the master circadian pacemaker, the hypothalamic suprachiasmatic nucleus (SCN), have been reported...
2018: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/29422075/arenavirus-infection-correlates-with-lower-survival-of-its-natural-rodent-host-in-a-long-term-capture-mark-recapture-study
#6
Joachim Mariën, Vincent Sluydts, Benny Borremans, Sophie Gryseels, Bram Vanden Broecke, Christopher A Sabuni, Abdul A S Katakweba, Loth S Mulungu, Stephan Günther, Joëlle Goüy de Bellocq, Apia W Massawe, Herwig Leirs
BACKGROUND: Parasite evolution is hypothesized to select for levels of parasite virulence that maximise transmission success. When host population densities fluctuate, low levels of virulence with limited impact on the host are expected, as this should increase the likelihood of surviving periods of low host density. We examined the effects of Morogoro arenavirus on the survival and recapture probability of multimammate mice (Mastomys natalensis) using a seven-year capture-mark-recapture time series...
February 8, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29367841/effect-of-synthetic-hormones-on-reproduction-in-mastomys-natalensis
#7
Apia W Massawe, Rhodes H Makundi, Zhibin Zhang, Ginethon Mhamphi, Ming Liu, Hong-Jun Li, Steven R Belmain
Rodent pest management traditionally relies on some form of lethal control. Developing effective fertility control for pest rodent species could be a major breakthrough particularly in the context of managing rodent population outbreaks. This laboratory-based study is the first to report on the effects of using fertility compounds on an outbreaking rodent pest species found throughout sub-Saharan Africa. Mastomys natalensis were fed bait containing the synthetic steroid hormones quinestrol and levonorgestrel, both singly and in combination, at three concentrations (10, 50, 100 ppm) for 7 days...
2018: Journal of Pest Science
https://www.readbyqxmd.com/read/29291115/the-shape-of-the-contact-density-function-matters-when-modelling-parasite-transmission-in-fluctuating-populations
#8
Benny Borremans, Jonas Reijniers, Niel Hens, Herwig Leirs
Models of disease transmission in a population with changing densities must assume a relation between infectious contacts and density. Typically, a choice is made between a constant (frequency-dependence) and a linear (density-dependence) contact-density function, but it is becoming increasingly clear that intermediate, nonlinear functions are more realistic. It is currently not clear, however, what the exact consequences would be of different contact-density functions in fluctuating populations. By combining field data on rodent host ( Mastomys natalensis ) demography, experimentally derived contact-density data, and laboratory and field data on Morogoro virus infection dynamics, we explored the effects of different contact-density function shapes on transmission dynamics and invasion/persistence...
November 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29190285/the-interplay-of-uv-and-cutaneous-papillomavirus-infection-in-skin-cancer-development
#9
Daniel Hasche, Sonja Stephan, Ilona Braspenning-Wesch, Julita Mikulec, Martina Niebler, Hermann-Josef Gröne, Christa Flechtenmacher, Baki Akgül, Frank Rösl, Sabrina E Vinzón
Cutaneous human papillomaviruses (HPVs) are considered as cofactors for non-melanoma skin cancer (NMSC) development, especially in association with UVB. Extensively studied transgenic mouse models failed to mimic all aspects of virus-host interactions starting from primary infection to the appearance of a tumor. Using the natural model Mastomys coucha, which reflects the human situation in many aspects, we provide the first evidence that only UVB and Mastomys natalensis papillomavirus (MnPV) infection strongly promote NMSC formation...
November 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29186900/rodent-papillomaviruses
#10
REVIEW
Aayushi Uberoi, Paul F Lambert
Preclinical infection model systems are extremely valuable tools to aid in our understanding of Human Papillomavirus (HPV) biology, disease progression, prevention, and treatments. In this context, rodent papillomaviruses and their respective infection models are useful tools but remain underutilized resources in the field of papillomavirus biology. Two rodent papillomaviruses, MnPV1, which infects the Mastomys species of multimammate rats, and MmuPV1, which infects laboratory mice, are currently the most studied rodent PVs...
November 27, 2017: Viruses
https://www.readbyqxmd.com/read/29033405/construction-and-expression-of-vectors-encoding-biologically-active-rodent-gonadotropins
#11
Akihiko Ohta, Yuichiro Tsunoda, Yoshihiko Tamura, Kayoko Iino, Naoto Nishimura, Hiroto Nishihara, Haruka Takanashi, Saishu Yoshida, Takako Kato, Yukio Kato
The gonadotropins, luteinizing hormone (LH) and follicle-stimulating hormone (FSH), are important hormones in vertebrate reproduction. The isolation of gonadotropins from the pituitary gland is sub-optimal, as the cross-contamination of one hormone with another is common and often results in the variation in the measured activity of LH and FSH. The production of recombinant hormones is, therefore, a viable approach to solve this problem. This study aimed to express recombinant rat, mouse, and mastomys FSH and LH in Chinese hamster ovary (CHO) cells...
December 15, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28969710/molecular-detection-of-leishmania-infantum-and-leishmania-tropica-in-rodent-species-from-endemic-cutaneous-leishmaniasis-areas-in-morocco
#12
Mohamed Echchakery, Carmen Chicharro, Samia Boussaa, Javier Nieto, Eugenia Carrillo, Ortega Sheila, Javier Moreno, Ali Boumezzough
BACKGROUND: Leishmaniasis remains a major public health problem in African nations, including Morocco, where little is known about the vertebrate reservoirs involved in the causal parasites' transmission cycles. The present study investigates the role of rodent species as potential reservoirs of Leishmania spp. in central Morocco, where both L. tropica and L. infantum have been reported. METHODS: Rodents were caught from 22 sites in central Morocco, by using Sherman metal traps, and identified morphologically...
October 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28967498/comparative-non-metric-and-morphometric-analyses-of-rats-at-residential-halls-of-the-university-of-benin-campus-nigeria
#13
E A Odigie, O K Ekeolu, O D Asemota, E A Uwagie-Ero, I T Aighewi, S U Ighedosa, S F Usifoh, B O Olugasa, O Asemota, T N E Fagboya
BACKGROUND: In mammals and across rat species, the variation in conformation is markedly observed in the head and the variation in the shape of the head is mostly determined by the shape of the skull. Hence comparative topographic analysis and morphometry is a veritable tool in precise categorization of peri-domestic rats and species identification. METHODS: Killed rodents around residential dwellings of students on campus were collected and measurements taken of external morphology...
September 26, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28882517/diagnosis-and-genetic-analysis-of-the-worldwide-distributed-rattus-borne-trypanosoma-herpetosoma-lewisi-and-its-allied-species-in-blood-and-fleas-of-rodents
#14
Paola A Ortiz, Herakles A Garcia, Luciana Lima, Flávia Maia da Silva, Marta Campaner, Carlos L Pereira, Sathaporn Jittapalapong, Luis Neves, Marc Desquesnes, Erney P Camargo, Marta M G Teixeira
Trypanosoma (Herpetosoma) lewisi is a cosmopolitan parasite of rodents strongly linked to the human dispersal of Rattus spp. from Asia to the rest of the world. This species is highly phylogenetically related to trypanosomes from other rodents (T. lewisi-like), and sporadically infects other mammals. T. lewisi may opportunistically infect humans, and has been considered an emergent rat-borne zoonosis associated to poverty. We developed the THeCATL-PCR based on Cathepsin L (CATL) sequences to specifically detect T...
September 5, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28873024/serological-survey-of-zoonotic-viruses-in-invasive-and-native-commensal-rodents-in-senegal-west-africa
#15
Christophe A Diagne, Nathalie Charbonnel, Heikki Henttonen, Tarja Sironen, Carine Brouat
Increasing studies on rodent-borne diseases still highlight the major role of rodents as reservoirs of numerous zoonoses of which the frequency is likely to increase worldwide as a result of accelerated anthropogenic changes, including biological invasions. Such a situation makes pathogen detection in rodent populations important, especially in the context of developing countries characterized by high infectious disease burden. Here, we used indirect fluorescent antibody tests to describe the circulation of potentially zoonotic viruses in both invasive (Mus musculus domesticus and Rattus rattus) and native (Mastomys erythroleucus and Mastomys natalensis) murine rodent populations in Senegal (West Africa)...
October 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28866987/helminth-composition-and-prevalence-of-indigenous-and-invasive-synanthropic-murid-rodents-in-urban-areas-of-gauteng-province-south-africa
#16
R S Julius, E V Schwan, C T Chimimba
Although synanthropic rodents such as the indigenous species, Mastomys coucha, and the invasive species, Rattus norvegicus, R. rattus and R. tanezumi, are well-known to be hosts to various micro- and macroparasites, their helminth parasite fauna is poorly studied in South Africa. In an attempt to remedy the situation, the aim of the present study was to investigate the helminth fauna of these sympatric rodent species, which were obtained from the informal settlements of Alexandra, Tembisa, Diepsloot and residential suburbs of Pretoria and Hammanskraal, Gauteng Province, South Africa...
September 4, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28789852/recombinant-calponin-of-human-filariid-brugia-malayi-secondary-structure-and-immunoprophylactic-potential
#17
Shiv K Verma, Ashish Arora, P Kalpana Murthy
In the search for potential vaccine candidates for the control of human lymphatic filariasis, we recently identified calponin-like protein, that regulates actin/myosin interactions, in a proinflammatory fraction F8 (45.24-48.64kDa) of Brugia malayi adult worms. In the present study, the gene was cloned, expressed, and the recombinant Calponin of B. malayi (r-ClpBm) was prepared and characterized. r-ClpBm bears homology with OV9M of Onchocerca volvulus, a non-lymphatic filariid that causes loss of vision and cutaneous pathology...
September 12, 2017: Vaccine
https://www.readbyqxmd.com/read/28748835/prevalence-of-lassa-virus-among-rodents-trapped-in-three-south-south-states-of-nigeria
#18
D E Agbonlahor, A Erah, I M Agba, F E Oviasogie, A F Ehiaghe, M Wankasi, O A Eremwanarue, I J Ehiaghe, E C Ogbu, R I Iyen, S Abbey, M Y Tatfeng, J Uhunmwangho
BACKGROUND & OBJECTIVES: Lassa fever has been endemic in Nigeria since 1969. The rodent Mastomys natalensis has been widely claimed to be the reservoir host of the Lassa virus. This study was designed to investigate the dis- tribution of species of rodents in three states (Edo, Delta and Bayelsa) of Nigeria and to determine the prevalence of Lassa virus amongst trapped rodents in the selected states. METHODS: Rodents were trapped during November 2015 to October 2016 from the three states in South-South re- gion of Nigeria...
April 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/28616660/arenavirus-dynamics-in-experimentally-and-naturally-infected-rodents
#19
Joachim Mariën, Benny Borremans, Sophie Gryseels, Bram Vanden Broecke, Beate Becker-Ziaja, Rhodes Makundi, Apia Massawe, Jonas Reijniers, Herwig Leirs
Infectious diseases of wildlife are typically studied using data on antibody and pathogen levels. In order to interpret these data, it is necessary to know the course of antibodies and pathogen levels after infection. Such data are typically collected using experimental infection studies in which host individuals are inoculated in the laboratory and sampled over an extended period, but because laboratory conditions are controlled and much less variable than natural conditions, the immune response and pathogen dynamics may differ...
September 2017: EcoHealth
https://www.readbyqxmd.com/read/28451959/impact-of-mining-and-forest-regeneration-on-small-mammal-biodiversity-in-the-western-region-of-ghana
#20
Daniel K Attuquayefio, Erasmus H Owusu, Benjamin Y Ofori
Much of the terrestrial biodiversity in sub-Saharan Africa is supported by tropical rainforest. Natural resource development, particularly surface mining in the rainforest, poses great risks to the region's rich and endemic biodiversity. Here, we assessed the impact of surface mining and the success of forest rehabilitation on small mammal diversity in the Western Region of Ghana. We surveyed small mammals in the project area and two adjoining forest reserves (control sites) before the mining operation and 10 years after mine closure and forest rehabilitation (topsoil replacement and revegetation)...
May 2017: Environmental Monitoring and Assessment
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